Reseeding Cool Season Grass
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Collapse ▲While it may seem that our primary objective should be to fill in empty patches, the best thing may be to determine what has caused the grass to die out. You may need
As cool fall breezes sweep across the state, now is a perfect time to breathe new life into an existing cool-season lawn.
A primary cause for renovation is filling in areas where grass has died out. This could be symptomatic of poor pH, incorrect fertilization, excessive thatch, or a variety of other causes. Make sure to grab a soil sample before you start to correct pH and nutrition.
After the soil sample, reduce weed competition in the areas you plan to reseed. Plan to use a combination of hand-weeding and herbicides to tackle these weeds, especially tough perennials. If the area has thatch build up, wait a week after applying herbicides before de-thatching.
Once you have your soil test results apply fertilizer and lime as needed and incorporate.
For bare spots, till the top four to six inches and smooth the soil before re-seeding. Ensure uniform broadcasting by passing over the area in one direction with half of the seeding rate then applying the remaining half at a right angle to the first pass. For areas where grass is thin but present, use a de-thatcher or verticutter to slice an opening in the ground. Drop seed into these furrows and lightly cover. Some cool-season grasses, such as tall fescue, do not spread to fill in an area but will form bunches.
Keep newly planted areas moist with light irrigation. As these areas fill in, encourage deeper rooting by watering less frequently but for a longer duration. Deeper roots are more resilient and can lead to a healthier stand of grass that has fewer weeds and disease issues. Avoid overfertilizing or adding too much nitrogen as this can push growth too quickly, leading to stress and health issues. With patience and care, soon you’ll have a yard that feels like new!
Selena McKoy is Horticulture Agent for North Carolina Cooperative Extension in Harnett County.